baxi 105e loss of presure

[kawasakiracer]

can any one help my baxi 105e will not keep its pressure after the heating has been on the pressure just drops back to zero top it up again and all is fine until the heating starts to cool all radiators are full so i guess no leaking pipe work could it be the expansion vessel

 

[powell30]

yes or pinholed heat ex......check your prv termination for water leakage for the first

 

[kawasakiracer]

yes or pinholed heat ex......check your prv termination for water leakage for the first

if the expansion vessel is knackered its right at the back i guess the boiler has to come off the wall to replace it could i put another one in line somewhere ??

 

[Newcastle88]

yes or pinholed heat ex......check your prv termination for water leakage for the first

if the expansion vessel is knackered its right at the back i guess the boiler has to come off the wall to replace it could i put another one in line somewhere ??

check far right hand isolation valve if there will be a silver cap on the end. part number 5122312 is a kit for a remote expansion vessel that has a flexible hose to fit on the end of the blank. If a filling loop has been fitted there then pipe one in.

 

[NatB]

yes or pinholed heat ex......check your prv termination for water leakage for the first

if the expansion vessel is knackered its right at the back i guess the boiler has to come off the wall to replace it could i put another one in line somewhere ??

The last plumber who replaced the expansion vessel on my 105e didn't want to have the boiler taken off the wall, recomissioned etc. He managed to get access to the single pipe by removing a few other things. I would have put in an external one in if he hadn't done that.

Terrible design to have a service part like that and force you to remove the boiler from the wall.